Brenda, I think the dead guy is the speaker's childhood--himself as a child--which he sees from the hilltop once the rain and clouds move away from the village below him.

"The weather turned around" seems obfuscating to me, but that's what I get from it. Unless it's a common Welsh expression, it seems to me that D.T. is going for the grand old style at the expense of clarity.

I don't think it's silly to care about line structure and white structure. Consciously or not, we respond to the poem as a whole, and that includes the way it looks on the page. Yes, there is such a geography, in my opinion, though I never know how to talk about it, or even make it conscious. Do these stanzas look like Welsh hills? I doubt it's that literal, but who knows?